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c. F. KETTERING AND w. A. cum/s1; rowan mun, AiPLICATIOIl HLED DEC.8. 1919- 1,3s0,975, 3 Patentedlune 7, 1921.

, 2 SHEETS-SHEET I.

[Hum [277? 1 M4 c. F. KETTERING AND w. A. CHRYST.

POWER PLANT.

APPLICATION FILED BULB. SIB.

PatentedJune 7, 1921.

'2 SHEETSSHEET 2.

a T: This: lapplication is a will be extremely-durable and eflieient in" NT} arms.

:.: 2.. ax-icrmRLEsF. KIQIITERINGKAND wILLraM A. CHRYST, or DAYTON, 01110, ASSIGNOBS,

nimEsNnassIsiqMEN'rs name-mega oonrrm, OEDAYTON, 01110, A COR- improvements I in Power 1 Plants, =of which the' following isa fullyclear and exact 'descriptionrn; 1 a

and other devices;

ending% a plication Serial No. 58,201- filed- No. 1,341,327. An'eobject of .the presentsinvention isto provide a combinedengine and-- dynamo' electric machinestructure, wherein the crank shaft of the engine -Wll1-;l)e' balanced on one end-b means of a flywheel structur'e'and on=t 'e opposite end by the" arma- 1 ture of the dynamo electricmachine;-which= fore set forth, which will be extremely com'- pact and sirnp le in-construction, and which may be manufactured at low'cost, but wh ch operation.

Further objects and advantages of the resent invention willappear hereinafter,

reference being had to the accompanying drawings, wherein a preferred form of embodiment of-the present invention is clearly i the crank case, is left open so as to com-'-- set iorthr' 4 Inn-the"drawings:

and dynamo electric machine embodied in ""bcrB, 1 91 serial No. 343,832.

7 citizens of the Unitedf States of Aniericmresiding at Daya ton; county of; -1 Montgomery, 1 and' State "01? Ohio'phave invented certain new 'and useful-=- division of" ouroc e aeia a ei fira entdatnet am. Original application filled cctobera'z, 19 15,- Sri'a1'No. 58,2075 Divided and this aphasia filed teas-- 1 17 "11' 1 I 3 a a the present invention, certain ofithe parts, belng shown elevation for the sake'of' clearness."

power plant disclosed in 'Fig. 1;

showingthe relation of 'said' brushes 'and their" mounting to -the commutator of the dynamo electric machine.

Q there is illustrated a power plant, including an'en%ine'120,which maybe of any suitable yp stance as compris'inga single cylinder engm'e' ofthe four cycle type.- -This plant also includes-a dynamo electricmachine 21, hereinafter referred to as an i electric machine, d1rectly coupled to the'engine, and capable ofhperation, either as a motor or as a gen .erator. f i The engine 20 may be said to constitute a prime mover, which is adapted to be started by the'operation of the-electric machine as a motor, and which then 'is-{adaptedto operate the electric machine as a generator to furnish current for any suitable purpose.

The engine in thepresent instance com prises a base 22,- which'may be separated rom or formed with the engine casing or crank case 2301? the engine, and which supports not only the engine, but also the electric machine 21, upon which are mounted the electrical control devices for the power plant. a

The crank case 23 is formed of a single casting, having inner and outer side and bottom walls 30 and 31 respectively. These walls-are spaced apart by means of ribs 32, in such a manner as to form an air chamber 33 therebetween.

This air chamber extends completely v Referring to the drawings, and particu la'rly-ito'Fi gs; 1' and2, it willbe noted that ut which is shown-in the present in-' 155 Flgl 2 is a View in end ele'vationof the Fig1i3 *is'a detail view 0f the commutator brushes and the mounting therefor, and

around the crank case, but is inclosed' at one end of the crank case by means of, the

end wall '29, which also acts as a'closure municate with the fan structure 35, included in the fly-wheel 440i the engine. This endv of'the crank-casechamber B4 is "closed by 1 it d We the to e i e ell so of the crank Head 36 supports bearing 47 and end wall gingean be removed from the frame 57 and thejarmaturecan then be removed from the crank" shaft.

29 supports bearing 28. Bearings 47 and 28' electrical control devi ces for the plant support engine crank -sh'aift 24 connected "by rod 26 with 'pisto'ir'25i' One 'end'of the shaft, desi ated by numeral 27 extends through bearirtilg 28, and serves as the armature shaft for t e generator to be described. Shaft s ippo i p n h ee ratd tr in a convenient and [accessible lo 1cition as shownjn the-drawin Q These control devices'fwhich may inc ude an ammeter 102, I an' ampere hour meter 103, a switch 109 or 24 :1Llso projeots' through bearing 4min other desired instrumentalities, are mount- P 7. fly eel s rwh eh eeeeee ed er withnn any suite le manner. v

The air chamber 33 is also open point. 37 so to comn unicate with the air h PPQ ';-Q d.-Q the w e is le t op to permit the air-gchamber ito comm lnicate ith. t u side a mo p re; although a guard 41, which -.isgpreferably ascreem-is uppe e d of the tub Referring-to.

i 21 comprises an ingosmg pasing andfield frame. 57, carrying pole shoes," 58, and' thelieldfwvindmgs 59,- (gnly one ogfi'ithe ole shoes and; field C0.l.lS b6l.l1g; .ShOWH); j his ra e (is e h ae hengi gtyre, that it npror e l mm ne-end, and in e mbod en us d, is how-.11 tas supported; from lthe engine crankcase by means el .QI-Ql'i eirred f mal securing devicesjwhich ho d the field ;rai;|1e;- reinoV,- outyin any way departing from .the'sspirit ably, yet securely against the; wall 29 ofrthe' crankcase. The a loying part orarmature 60 of the electric machine is of substantial frames e heree-su th arma ure:

andconstitutes a; protective casing) for ,the same. .As is evident iromthed-rawmgsthe field framemay he readily-removed and the armature laid bare merely by-removing thee; electrical control devices and for thegein- Ihe armature isproyided withthe usual windings, and rinelucles a commutator 63 which cooperates-with suitable brushes 64, clearly shown in Fig. 3." Each of these brushes is mounted upon a plate 65. Each of these plates is provided wrtha tongue 67,

which fits within a groove or opening 69,

formed in the adjacen v find-of the, next succeeding late. In this manner a complete ring-is orrned, which is secured hy means of bolts 69 to the frame 57-, oi the elertric machine. These bolts 69, pass through elongated slots 70, formed in each plate so that while it is-possible to adjust the entire ring,-. covered-with and therefore all of the brushes, by loosen- 'ing tl1e.respective.bQll it is impossible to l adjust the-respectivebrushes relative to each other. J

66 inclosi'ng the-commutator andlbrush ri ging. By; removing covenfifi, .thebruSh rig wheel l to balance chamber.- 3 8,= formed. by surround ng the eni :ias; .51; v W i L-.. cured upon the generator as at the frame by any suitable means such as a pair ;of brackets 106;

mature (immovable partfcarries thee-arma ture :Winding, but this, arrangement is; merely illustrative and is not; tintended asqimportg.,.1, the electric machineij mg any limitations on the -meaningii.of:=-the 3. terms .-=field frames andsffarmature: as eming understood, b those killed in the art that 'the terms fie d frameeand I armature :as

..-.he1 '-ein, employed are. synonymous with the w; are in general use in the arhand which zit is understood -maycarryother fOIIIlS'IOf EWIId-m'gsthan those herein disclosed, .with- Z. and scope of the invention.

From the foregoing descriptiom itis apse'sses mumerous .adva1 1tages*% among which mey be mentioned the following: o1

-l The generator and-:.engine' are. directly connected thereby? eliminating ,-the use of belts, chains and-otherformsof couplin s. 2. No separate base is required-tor t e.

'erator since the engine crankcase supports frame, therebyiefiecting a saving of materlal andincreasmgfithe accessibility, compactness :and .neatnessof the parts men-.-

-tioned, as well as rendering the plant as a whole;,-more compact-and portable.

3.- The crank shaftvis supported by only two bearings. -This constructionfzfacllitates the .alinement of the .crank shaft bearings 4. The elimination of the third hearing at the, commutator endof the crank shaft simplifies the lubrication problem and removes all liability :of the commutator being reaseandioil 5, The over anging armature of substan- --tia1 .=;:veigh serves :to balance forces,; s et .up

when in motion it functi wasmiaflymheel member coiiperating i mtli fihe enginedly- I l I in the particular embodiment; inxgr ne cylinder 39 with the draft tube --4;0.-,- vention:-,:shoWn ,uandz'idescribemz the field ployediin the specification .and claims; it; he?

perent- -thata power-49' ant UOIIStI'HCtBd'IiD IOO accordance with the; present invention ;pos--- both the control ,devi,ces}and the. igcner 2120]";

and steady the engine op:-

in; crank shaft. itlldgithQ-rCIfl'Pk 5 case by 1 :the

k, H a

,4 1 ;-:we'ight of the overhanging flywhee Hand The generator frame .57 supports a-coner r,sso,915

oration,- thereby permitting 'a reduction in the size and weight of the en ine flywheel and-a better arrangement of t e parts.

6..The armature can easily be removed for inspection and repair by removing the cover 66 and the brush supporting plates 65.

7. The removability of the overhanging field frame and inclosing casing. by merely removing the field framebolts makes it easy to lay bare the armature arid commutator and facilitates the repair or replacement of any ofthe parts mentioned.

8. The support of both the field frame and the armature in overhangin relation from the engine crank case facilitates the accurate centering and adjustment of the armature and field frame.

While the form of mechanism herein shown and described constitutes a preferred embodiment of one form of the invention, it is to be understood that other forms might be adopted and various changes and alterations made in the shape, size and proportion of the elements therein without departing from the spirit and scope of the invention.

What we claim is as follows:

1. In a device of the character described, the combination with an engine, including a crank case, crank shaft bearings and a crank shaft, one end of which projects beyond said bearings; of an electric unit including an armature fixedly mounted upon the pro'ecting endof said crank shaft, and adapte to be driven thereby; and an overhanging field frame supported by the crank case about the armature, said field frame being open ended to permit the endwise removal of the armature.

2. In a power plant, the combination with an engine including a crank case having one end wall formed integrally therewith, said crank case being open at the other end; of a crank case cover plate; bearings in the end wall and cover plate; a crank shaft journaled in said bearings and extending beyond said end wall and cover plate; a flywheel carried by the shaft outside the cover plate; a generator armature supported by said shaft outside said end wall; and a generator field frame supported by said crank case.

3. In a power plant, the combination with an engine including a crank case having one end wall formed integrally therewith, said crank case being open at the other end; of a crank case cover plate; bearings in the end wall and cover plate; a crank shaft journalcd in said bearings and extending beyond said end wall and cover plate; a flywheel carried by the shaft outside the cover plate; a generator armature removably supported by said shaft outside said end wall; a generator field frame supported by said crank case end wall; and brush rigging supported by said field frame.

4. In a device of the character described,

the combination with an engine, including a crank case, crank shaft bearings and a crank shaft, one end of which projects beyond said bearings; of an electric unit including an armature mounted upon the proj eotin" endof said crank shaft, and adapted to be riven thereby; and an inclosin casin for. the armature supported. from t 1e engineand com-. a field frame removably supported" about the armature andiada ted: to be PG-(F prising moved as a whole to lay bare t e armature.

5. A power plant having a prime mover and a dynamo electric machine adaptedto be driven by the prime mover, comprising, in combination, an internal combustion en- 'ne having a crank case, an engine crank shaft supported on but two bearings and having its ends extending beyond the bearings and the crank case, an engine flywheel mounted on one extended end of the crank shaft,.and an armature of substantial wei ht fixedly mounted on the oppositely exten ed end of the crank shaft.

6. In a device of the character described, the combination with an engine, including a crank case, crank shaft bearings and a crank shaft, one end of which projects be 0nd said bearings; of a dynamo-electric machine com prising an armature of substantial weight fixedly mounted upon the projecting end of the crank shaft, a commutator on said shaft beyond the armature, and a field frame secured directly to the crank case and overlying the armature.

7. In a device of the character described, the combination with an engine, comprising an engine casing, an engine crank shaft extending beyond the engine casing, and a bearing for said shaft carried by the casing; of a dynamo-electric machine comprisin an armature of substantial weight mounted on the extended portion of said crank shaft and adapted to be driven thereby, and a field frame and inclosing casin surrounding the armature and secured to file engine casing, said field frame and inclosing casing being removable to lay bare the armature without dismounting the armature from the engine crank shaft.

8. A power plant comprising, in combination, an engine including an engine casing, an engine crank shaft havin its ends extending on opposite sides of t e engine casing, bearings for the crank shaft, and a fl wheel mounted on one extended end of t e crank shaft; a dynamo-electric machine comprising an armature fixedly mounted on the opposite extended end of the crank shaft and a field frame surrounding the armature and secured to the engine casing; and electrical control devices for the power plant supported from the engine casing.

9. A unitary power plant comprising, in combination, an engine including an engine casing, an engine crank shaft having one end extending beyond the engine casing, and devices For the power plant mounted on the bearings for the crank shaft; :t dynamoswitchboard. electric machine comprising an armature of In testimony whereof we aflix our signa- Sutstantiel weight xlnopntedforli the extended tul'es. t

5 en of the crank S13. t, 21 1e (1 frame sup- I e horted from the engine casing and overlying the armature, said field frame being J 4 open ended to permit the endwise removal Vlitnesses: ,z' of the armature;.:a switchboard supported v MILDRED PEAIRET" 10 on the power plant; and electrical control ALvINA LEIrMnN; 

